I understand your concern.
From your history, it seems like you are suffering from either a balanitis or a local urethral infection.
It needs to be controlled before you indulge in any kind of sexual activities, as the infection can only get worse.
This needs to be checked by a urologist who can guide you and give you appropriate medicines. If the infection is confirmed after the physical examination, a course of Tab. Doxycycline 100 mg twice daily for 7 days will help in reducing the infection.
Oral sex particularly can increase the infection as there are lots of bacteria in the oral cavity ( mostly part of the local flora ). So it is better avoided till the infection is controlled.

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